Sonora Junction Shoulders Project


SCH Number
Lead Agency
California Department of Transportation, District 9 (DOT)
Document Title
Sonora Junction Shoulders Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use

Document Description
The California Department of Transportation (CALTRANS) District 9 is proposing the Sonora Junction Shoulders project, located west of Bridgeport near Sonora Junction in Mono County. This project proposes to widen the existing paved shoulders on U.S. 395 from Burcham Flat Road to the south side of the US 395/SR 108 intersection (postmiles 91.6-93.4). It also proposes to install shoulder rumble strips, upgrade existing guardrails, and correct the super-elevations of three substandard curves. There are three “build” alternatives considered for this project. All three alternatives will also require realigning Hot Creek at postmile 92.35 to prevent the creek from undermining the highway. An option to install wildlife crossing structures under the highway and exclusionary fencing is also proposed. Right of way will need be acquired from the Humboldt-Toiyabe National Forest as well as temporary construction easements.

Contact Information
Angela Calloway
Caltrans District 9
Lead/Public Agency
500 S. Main Street
Bishop, CA 93514

Phone : (760) 872-2424

California Department of Transportation (Caltrans) District 9
Project Applicant


near Bridgeport
Cross Streets
U.S. 395 and State Route 108
State Highways
U.S. 395 and S.R. 108
Hot Creek
Other Location Info
Postmiles 91.6 to 93.4

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation (Shoulder Widening)
Project Issues
Aesthetics Biological Resources Hazards & Hazardous Materials Vegetation Wetland/Riparian
Reviewing Agencies
California Air Resources Board (ARB) California Department of Conservation (DOC) California Department of Forestry and Fire Protection (CAL FIRE) California Department of Parks and Recreation California Department of Water Resources (DWR) California Native American Heritage Commission (NAHC) California Natural Resources Agency California Regional Water Quality Control Board, Lahontan South Lake Tahoe Region 6 (RWQCB) California State Lands Commission (SLC) California Transportation Commission (CATC) Department of Toxic Substances Control State Water Resources Control Board, Division of Drinking Water State Water Resources Control Board, Division of Water Quality California Highway Patrol (CHP) California Department of Fish and Wildlife, Inland Deserts Region 6 (CDFW)


Environmental Document
09-36800 Sonora Shoulders Summary_Form   PDF 619 K 09-36800_Sonora_Shoulders_DED,Signed   PDF 14214 K NOI to file MND_Sonora Shoulders   PDF 229 K
09-36800 Sonora Shoulders NOC   PDF 303 K
State Comment Letters [Comments from state reviewing agencies]
2021020013_CDFW Comment   PDF 350 K 2021020013_CHP Comment   PDF 140 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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